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TI-2021-22513 Aliases CVE-2021-47899GHSA-38wv-wfx6-3cx2

YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability

Priority HIGH 70CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

YetiShare File Hosting Script 5.1.0 contains a server-side request forgery vulnerability that allows attackers to read local system files through the remote file upload feature. Attackers can exploit the url parameter in the url_upload_handler endpoint to access sensitive files like /etc/passwd by using file:/// protocol.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00301 22nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MfscriptsYetiShare File Hosting Scriptv5.1.0—No fix listedCNA
  • YetiShare File Hosting Script VendorMfscripts Affected v5.1.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47899
  2. 2026-10-03 Alias added: GHSA-38wv-wfx6-3cx2

References

Exploit 1

Other 2

  • TI-2019-14482 MFScripts YetiShare v3.5.2 through v4.5.4 might allow an attacker to reset a password by… CVSS 3.1CRITICAL 9.8
  • TI-2019-14220 class.userpeer.php in MFScripts YetiShare 3.5.2 through 4.5.3 uses an insecure method of… CVSS 3.1CRITICAL 9.1
  • TI-2019-14479 payment_manage.ajax.php and various *_manage.ajax.php in MFScripts YetiShare 3.5.2… CVSS 3.1HIGH 8.8
  • TI-2019-14219 _account_move_file_in_folder.ajax.php in MFScripts YetiShare 3.5.2 directly inserts… CVSS 3.1HIGH 8.8
  • TI-2019-14222 MFScripts YetiShare 3.5.2 through 4.5.3 does not set the SameSite flag on session… CVSS 3.1HIGH 8.8
  • TI-2019-14480 MFScripts YetiShare v3.5.2 through v4.5.4 places sensitive information in the Referer… CVSS 3.1HIGH 7.5
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences